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GB1490700A - Optical fibre preform manufacture - Google Patents

Optical fibre preform manufacture

Info

Publication number
GB1490700A
GB1490700A GB59168/73A GB5916873A GB1490700A GB 1490700 A GB1490700 A GB 1490700A GB 59168/73 A GB59168/73 A GB 59168/73A GB 5916873 A GB5916873 A GB 5916873A GB 1490700 A GB1490700 A GB 1490700A
Authority
GB
United Kingdom
Prior art keywords
silica
optical fibre
dopant
fibre preform
rod
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB59168/73A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB59168/73A priority Critical patent/GB1490700A/en
Priority to ZA00747538A priority patent/ZA747538B/en
Priority to AU75894/74A priority patent/AU489607B2/en
Priority to DE19742458389 priority patent/DE2458389A1/en
Priority to NL7416401A priority patent/NL7416401A/en
Priority to IT30681/74A priority patent/IT1027769B/en
Priority to ES433037A priority patent/ES433037A1/en
Priority to CH1692074A priority patent/CH585160A5/xx
Priority to FR7442032A priority patent/FR2255266B1/fr
Priority to JP49145807A priority patent/JPS5097347A/ja
Publication of GB1490700A publication Critical patent/GB1490700A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C21/00—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/012—Manufacture of preforms for drawing fibres or filaments
    • C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
    • C03B37/01225—Means for changing or stabilising the shape, e.g. diameter, of tubes or rods in general, e.g. collapsing
    • C03B37/01228—Removal of preform material
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C13/00—Fibre or filament compositions
    • C03C13/04—Fibre optics, e.g. core and clad fibre compositions
    • C03C13/045—Silica-containing oxide glass compositions
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/06—Glass compositions containing silica with more than 90% silica by weight, e.g. quartz
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2201/00—Glass compositions
    • C03C2201/06—Doped silica-based glasses
    • C03C2201/30—Doped silica-based glasses containing metals
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2201/00—Glass compositions
    • C03C2201/06—Doped silica-based glasses
    • C03C2201/30—Doped silica-based glasses containing metals
    • C03C2201/31—Doped silica-based glasses containing metals containing germanium
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2203/00—Production processes
    • C03C2203/50—After-treatment

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Optics & Photonics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Glass Compositions (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)

Abstract

1490700 Optical fibre preform STANDARD TELEPHONES & CABLES Ltd 10 Dec 1974 [20 Dec 1973] 59168/73 Heading ClM An optical fibre preform is made from silica substantially uniformly doped with an oxide dopant selected from GeO 2 , Sb 2 O 3 and Ga 2 O 3 or mixtures thereof, which dopant oxide increases the refractive index of the silica and will diffuse out of the silica on heating, by heating a rod of the doped silica to 1200‹ C. under conditions such that some of the oxide dopant is driven off, to provide a surface region of reduced refractive index. The rod may be treated as it is pulled from a melt of the doped silica. The glass rod (e.g. of 80% by weight SiO 2 and 20% by weight GeO 2 ) may be heated to 1200‹ C. for “-1 minute so that the dopant is depleted to a depth of about 50 microns.
GB59168/73A 1973-12-20 1973-12-20 Optical fibre preform manufacture Expired GB1490700A (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
GB59168/73A GB1490700A (en) 1973-12-20 1973-12-20 Optical fibre preform manufacture
ZA00747538A ZA747538B (en) 1973-12-20 1974-11-26 Optical fibre manufacture
AU75894/74A AU489607B2 (en) 1973-12-20 1974-11-29 Optical fibre manufacture'1
DE19742458389 DE2458389A1 (en) 1973-12-20 1974-12-10 METHOD OF MANUFACTURING FIBER GLASS FOR OPTICAL PURPOSES
NL7416401A NL7416401A (en) 1973-12-20 1974-12-17 PROCESS FOR THE MANUFACTURE OF OPTICAL FIBER.
IT30681/74A IT1027769B (en) 1973-12-20 1974-12-18 OPTICAL FIRPA OF SILICON DIOXIDE AND GERMANIUM DIOXIDE
ES433037A ES433037A1 (en) 1973-12-20 1974-12-18 Optical fibre preform manufacture
CH1692074A CH585160A5 (en) 1973-12-20 1974-12-19
FR7442032A FR2255266B1 (en) 1973-12-20 1974-12-19
JP49145807A JPS5097347A (en) 1973-12-20 1974-12-20

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB59168/73A GB1490700A (en) 1973-12-20 1973-12-20 Optical fibre preform manufacture

Publications (1)

Publication Number Publication Date
GB1490700A true GB1490700A (en) 1977-11-02

Family

ID=10483204

Family Applications (1)

Application Number Title Priority Date Filing Date
GB59168/73A Expired GB1490700A (en) 1973-12-20 1973-12-20 Optical fibre preform manufacture

Country Status (9)

Country Link
JP (1) JPS5097347A (en)
CH (1) CH585160A5 (en)
DE (1) DE2458389A1 (en)
ES (1) ES433037A1 (en)
FR (1) FR2255266B1 (en)
GB (1) GB1490700A (en)
IT (1) IT1027769B (en)
NL (1) NL7416401A (en)
ZA (1) ZA747538B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2746418B2 (en) * 1976-11-02 1980-05-22 Fujitsu Ltd., Kawasaki, Kanagawa (Japan) its manufacture, optical transmission lines manufactured from it and a method for manufacturing an optical transmission line
JPS54106248A (en) * 1978-02-08 1979-08-21 Nippon Telegr & Teleph Corp <Ntt> Production of optical fibers
DE2912960A1 (en) * 1979-03-31 1980-10-09 Licentia Gmbh METHOD FOR THE PRODUCTION OF OPTICAL FIBERS
GB2131417B (en) * 1982-12-02 1987-04-08 Western Electric Co Ltd Optical device and preform fabrication

Also Published As

Publication number Publication date
FR2255266B1 (en) 1978-07-07
DE2458389A1 (en) 1975-07-03
NL7416401A (en) 1975-06-24
CH585160A5 (en) 1977-02-28
ES433037A1 (en) 1976-11-16
ZA747538B (en) 1975-12-31
FR2255266A1 (en) 1975-07-18
AU7589474A (en) 1976-06-03
IT1027769B (en) 1978-12-20
JPS5097347A (en) 1975-08-02

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee